While Liz and Abe lead a platoon of agents and soldiers into the Hollow Earth, Kate Corrigan tries to juggle work with romance. She travels to Austria to explore the ruins of Hunte Castle — the haunted Nazi fortress where crime fighter Lobster Johnson died and Hellboy fought the Conqueror Worm — where she hopes to place Lobster Johnson’s ghost to rest and make him free the spirit of Johann Kraus.